There are 16 boys in an english class of 28 students that retro of boys to the total numbers of students in this class is typical of the whole school there are 476 students in the school. about how many are boys?

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.